function date (form){
var serial=form.inputbox.value;
if(serial<=0)
	{message="That was an invalid serial number";year="";}
else{
message="Your Winchester Model 1906 was manufactured in ";
if(serial<=52278)
	{year=1906;}
else{
if(serial<=89147)
	{year=1907;}
else{
if(serial<=114138)
	{year=1908;}
else{
if(serial<=165068)
	{year=1909;}
else{
if(serial<=221189)
	{year=1910;}
else{
if(serial<=273355)
	{year=1911;}
else{
if(serial<=327955)
	{year=1912;}
else{
if(serial<=381922)
	{year=1913;}
else{
if(serial<=422734)
	{year=1914;}
else{
if(serial<=453880)
	{year=1915;}
else{
if(serial<=483805)
	{year=1916;}
else{
if(serial<=517743)
	{year=1917;}
else{
if(serial<=535540)
	{year=1918;}
else{
if(serial<=593917)
	{year=1919;}
else{
if(serial<=598691)
	{year=1921;}
else{
if(serial<=608011)
	{year=1922;}
else{
if(serial<=622601)
	{year=1923;}
else{
if(serial<=636163)
	{year=1924;}
else{
if(serial<=649952)
	{year=1925;}
else{
if(serial<=665484)
	{year=1926;}
else{
if(serial<=679892)
	{year=1927;}
else{
if(serial<=695915)
	{year=1928;}
else{
if(serial<=711202)
	{year=1929;}
else{
if(serial<=720116)
	{year=1930;}
else{
if(serial<=725978)
	{year=1931;}
else{
if(serial<=727353)
	{year=1932;}
else{
if(serial<=729305)
	{year="the years just after 1932";}
else{message="That was an invalid serial number";year="";}
}}}}}}}}}}}}}}}}}}}}}}}}}}}
alert (message + year +".");
}